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HF, VHF, and UHF systems and technology

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8 Author(s)
Raab, F.H. ; Green Mountain Radio Res., Colchester, VT, USA ; Caverly, R. ; Campbell, R. ; Eron, M.
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A wide variety of unique systems and components inhabits the HF, VHF, and UHF bands. Many communication systems (ionospheric, meteor-burst, and troposcatter) provide beyond-line-of-sight coverage and operate independently of external infrastructure. Broadcasting and over-the-horizon radar also operate in these bands. Magnetic-resonance imaging uses HF/VHF signals to see the interior of a human body, and RF heating is used in a variety of medical and industrial applications. Receivers typically employ a mix of analog and digital-signal-processing techniques. Systems for these frequencies make use of RF-power MOSFETs, p-i-n diodes, and ferrite-loaded transmission-line transformers

Published in:

Microwave Theory and Techniques, IEEE Transactions on  (Volume:50 ,  Issue: 3 )

Date of Publication:

Mar 2002

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